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(No Modem' 2 Sheets-Sheet 1. K. TROBAGH. INGANDBSGBNT LAMP POR LIQUID HYDBOCARBONS. No. 581,090.

Patented Apr. 20, 1897.

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(No Mode1.\ 2 Sheets-Sheet 2.

K. TROBACH. VINANDESCENT LAMP FOR LIQUID HYDROCARBONS.

NO. 581,090. PatGDtGdA'pI. Z0, 1897.

Inventor lfonnm Zvafa NTTE STATES PATENT EErcE.

KONRAD TROBACH, OF PANKOW, GERMANY.

INCANDESCENT LAiVIP FOR LIQUID HYDROCARBCNS.

SPECIFICATION forming part of Letters PatentlNo. 581,090, dated April 20, 1897.

Application filed September 16, 1895. Serial No. 562,682. (No model.)

To all whom t may concern:

Be it known that I, KONRAD TRoBAcH, a subject of the King of Prussia, German E1nperor, residing at Pankow, in the Kingdom of Prussia and German Empire, have invented certain new and useful Improvements in Incandescent Lamps for Liquid Hydrocarbons, of which the following is a specification.

This invention relates to an improved incandescent lamp for liquid hydrocarbonssuch as alcohol, benzin, petroleum, &c.-in which an incandescent mantle can be employed for the reason that the liquid hydrocarbons are first vaporized and the vapors thus obtained conducted in superheated state into a mixing-chamber, from which they are conducted by an air and gas mixer to the burner-head for being-burned.

The lamp is provided with a combined receptacle for the starting and heating flame, which receptacle is insulated from the devices which are used for the vaporizing and mixing of the liquid hydrocarbon, while the regulation of the gas-pressure is obtained by the adjustment of the vaporizing and mixing devices in connect-ion with the level of the liquid in the lamp-fount, as will be fully described hereinafter and finally pointed out in the claims.

In the accompanying drawings, Figure l represents a vertical central section of my improved `incandescent lamp for liquid hydrocarbons shown in the act of heating up the same. Fig. 2 is a detail vertical section of the holder for the incandescent mantle,which holder incloses the gas-mixing device. v Fig. 3 is a side elevation, partly in section, of the vaporizing-retort with its gas-supply nozzle. Figs. 4t and 5 are respectively top Views and vertical sections of the gas-supply nozzle, showing two different modifications of the same; and Fig. 6 is respectively a detail vertical transverse section and a plan view of the extinguishing-cap for the heating-flame.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents a lamp-fount, in the upper part of which is arranged a receptacle a, the contents of which serve for the preliminaryheating and the generation of vapors from the liquid in the wicktube Z), which latter leads from the fount A in upward direction through the receptacle a.

The receptacle a is preferably filled with alcohol. Into the upper part of the receptacle a is inserted a burner c, which surrounds the wick-tube b of the main burner B, so as to form an annular space d around the wicktube. The flame of the preliminary heating produces the heating of the upper part of the Wick-tube b, so that the liquid hydrocarbon which is raised by the wick c in the Wick-tube is vaporized, theheated portion serving in the nature of a retort for vaporizing the liquid hydrocarbon.

The wick e is preferably composed of charcoal, which is preferably used in the form of grains in place of a Wick formed from textile fibers. Charcoal is used because it is a bad conductor of heat, by which it is enabled to act as an .insulating material between the fount A and the receptacle a, and, further, because it does not yield at higher temperature any products of distillation such as would be the case by using a fibrous wick of ordinary construction. Charcoal has the further advantage that it retains permanently its porous character vand is thereby adapted in a high degree for the raising of liquid hydrocarbons.

The wick-tube b is surrounded by a second larger tube f, in which the Wick-tube is vertically movable, it being held in position by means of elastic rings g. Between the wicktube h and the surrounding tube f is formed the annular air-chamber d, before described. The tube f serves also as a wick-tube for the preliminary heater c, and can be again inclosed by a special wick-tube, over which the ordinary tubular Wick his then placed, which is actuated by means of spur-wheels in the same manner as in the ordinary burners with round wicks.

The guiding and raising mechanism for the Wick for preliminaryheating is not shown, as any desired construction can be used and as the same forms no part of this invention.

On lthe heater c is arranged a sliding cap fi, which incloses the wick-tube b, and which for preliminary heating is moved in upward IOO direction, as shown in Fig. l, while it is pushed in downward direction in the position shown in dotted lines in Fig. l when the preliminary heating is accomplished, so that the cap incloses the alcohol-carrying wick h at its upper end.

For converting the vapors obtained from the liquid hydrocarbons into gas adapted for combustion there are arranged two tubes nz, which are, as shown in Fig. l, of ditlfcrent diameters, so that au annular space nis formed between the tubes l and m. 'lhe interior tube m is open at both ends, while the larger outer tube Z is closed at its upper end, forming a rounded-ott portion o, its lower end being closed by an interposed packingring p, as shown in Fig. l.

The outer tube l is provided at that portion which is located at the inside of the retort-chamber q with a reinforcing-ring fr, in which the outlet-orifice s is arranged that is opened or closed by the needle-valve f'. The retort-chamber (1 terminates in a nozzle n, which is made ot' a suitable non-conductor of heat, such as Speckstein, and which eitherincloses tightly the gas-generator t m, and has small outlet-apertures r, as shown in Fig. 4., or which is provided with an annular opening w for the escape of the gases into the mixing-chamber a', as shown in Fig. 5. The mixing-chamber ,r is provided with an opening for the ingress ot air, so that an clli'ective injector-mixer is thus obtained.

The gas-generating tubes l m are extended downward into the wick-tube t) to a point below the Vaporizing-point-that is to say, to a point below the upper edge ot' the round burner c. The tubes fm. are surrounded at their upper ends bya tubular mantle-holder y, so that the main heating-burner ll, withits incandescent mantle C, can be readilyremoyed without di tliculty byunscrewing the threaded neck of the mixing chamber from the threaded neck of the retort-chamberq. The incandescent mantle C, with its holderfgj, can also be detached directlyv from the main burner B, so that the devices for vaporizing and mixing the ga ses can be inspected and adjusted for producing' the proper degree of gaspressure. The tubular holder 1/ for the incandescent mantle is provided at its lower end with an enlarged base having a coveringscreen .2', said base encircling the main burner B, as shown in Fig. l.

The operation of my improved incandescent lamp for liquid hydrocarbons is as follows: After the fount A is filled with a suitable hydrocarbon, for instance petroleum, and the interior receptacle d with the heating liquid, for instance alcohol, the extinguishing-cap t' is moved in upward direction, so that the circular burner c can be lighted. At the interior of the wick-tube Z) and above the circular burner c are generated petroleum-vapors, which gradually fill the tubes on and [and remain in the same as long as the needle-valve t is in closed position. As soon as a quantity ot vapors sufficient [or producing the incandescence oi' the mantle. is generated the needle-valve is opened and the vapors are conducted in the retort-chamber q and from the same through the nozzle 2t into the mixingchamber a', in which they are mixed with air and from which they are conducted to the main burner l, where they are burned. lVhile this process takes place, the gas-gcnerating tubes Z m are heated by the preliminary heating-flame, as well as by the main tlame, so that the petroleum-vapors which enter into the lower end of the tube m are changed in their passage through the outletorifice s, within the gas-retort (l, and are conducted in snperheated state into the mixingchan'iber m. lYhen this conversion into gas andthe sul'ierheatingof the sameis obtainedthat is to say, when the gas-tubes tm are sufficiently heatedthe preliminary heatingflame is extinguished by turning down the wiel; 7L and moving the extinguishing-cap1l into downward position, as shown in dotted lines in Fig. l. The evaporation and conversion of the petroleum, which is conducted in upward direction by the charcoal wickbody c from the fount A, into vapors and gas is thenceforth accomplished auttnnatically by the heat which is transmitted from the gasgenerating tubes in downward direction, so that gas in su tli cient quantities t'or prod ucing the eolnplete incandescence. ot the mantle C is obtained.

lVhen it'. be desired to extinguish the main heating-llame, it is only necessary to close the needle-valve t. The vapors which are generated after the closing of the valve are retained in the gas-generating tubes Z m and in the wick-tube t), which extends around the same, so that any obnoxious smell caused by the generation of vapors is obviated. For regulating the pressure of the gas the wicktube b is made, by means of the packing-ring g, movable in the tubef. lVhen the wiel:- tube t), with its carbon wick-body c, is immersed more or less into the fountA, the gaspressure is greater or smaller in proportion to the increased or decreased height of the liquid hydrocarbon contained inthe fount A. Notwithstanding the gradual lowering ol' the level of the liquid hydrocarbon in the fount A the gas-pressure can be easily kept constant by the gradual downward sliding of the wick-tube o into the fount A.

My improved incandescent lamp for liquid hydrocarbons has the advantage, as compared with other constructions heretofore known, that the combination of the main fount with a separate chamber for the liquid for preliminarily heating the main heating-flame for the incandescent mantle C can be generated with gas from various hydrocarbons, such as alcohol, benzin, petroleum, die., which can be used at the same time without danger, inasmuch as the heating, and Yaporizing take IOO IIO

place separately from the supply of gas to the main heating-Haine and as a meansis devised by Which the perfect conversion of the vapors of the liquid hydrocarbons into gas form is obtained.

Another advantage consists in the fact that the preliminary heating-ame is only requiredV for the preliminary heating of the Wick-tube for producing the vaporizing of the hydrocarbon in the main fount, a retort above the heating-flame provided With a valved orifice, a mixing-chamber above said retort, gas-generating tubes extending above and below the mixing-chamber, a main heating-burner, and a holder for the incandescent mantle supported on the main burner and provided With a screened base, substantially as set forth.

2. In incandescent lamps for liquid hydrocarbons, the combination of a main fount containing the liquid hydrocarbon for feeding the main heatingflame, with a secondary chamber arranged at a considerable distance above the bottom of the main fount for supplying the preliminary heating-flame, a Wicktube extending through the secondary chamber into the main fount, and a burner extending from the secondary chamber and encircling the Wick-tube, substantially as set forth.

3. In incandescent lamps for liquid hydrocarbons, a shiftable Wick-tube for supplying the main heating-flame, gas-generating tubes connected With the shiftable Wick-tube and provided with a valved orifice, and a burner for the preliminary heating of said Wick-tube, whereby the gas-pressure is regulated in connection with the level of the liquid in the fount, and the automatic generation of vapors from the liquid hydrocarbon and their conwersion into gas is secured, substantially as setforth.

4. In incandescent lamps for liquid hydrocarbons, the combination of a Wick-tube, gasgenerating tubes connected With and extending upwardly from the tube, a needle-valve for said generating-tubes, a closed retortchamber encircling the gas-generating tubes and communicating With the latter through the medium of the orifice controlled by said valve, a mixing-chamber above the retort, and a nozzle by which the vapors are discharged into the mixing-chamber, substantially asset forth.

5. In an incandescent lamp for liquid hydrocarbons, a detachable holder consisting of a tubular portion provided at its lower end With an enlarged base, said base having a covering-screen at the lower end of the tubular portion of the holder, substantially as set forth.

In Witness whereof I have hereunto set my v hand in presence of tWo Witnesses.

KONRAD TROBACH.

Vitnesses:

CRAs. I-I. DAY, G. WILLNER. 

